| /* TestMemoryPool.java -- Tests the memory pool beans. |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath examples. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. */ |
| |
| package gnu.classpath.examples.management; |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.MemoryPoolMXBean; |
| import java.lang.management.MemoryUsage; |
| |
| import java.util.Arrays; |
| import java.util.Iterator; |
| |
| public class TestMemoryPool |
| { |
| |
| /** |
| * 1mb in bytes |
| */ |
| private static final int MB = 1 << 20; |
| |
| public static void main(String[] args) |
| { |
| Iterator beans = ManagementFactory.getMemoryPoolMXBeans().iterator(); |
| while (beans.hasNext()) |
| { |
| MemoryPoolMXBean bean = (MemoryPoolMXBean) beans.next(); |
| System.out.println("Bean: " + bean); |
| System.out.println("Name: " + bean.getName()); |
| System.out.println("Collection usage: " + bean.getCollectionUsage()); |
| boolean collectionUsage = bean.isCollectionUsageThresholdSupported(); |
| System.out.println("Collection usage threshold supported: " |
| + collectionUsage); |
| if (collectionUsage) |
| { |
| System.out.println("Collection usage threshold: " |
| + bean.getCollectionUsageThreshold()); |
| System.out.println("Setting collection usage threshold to 1MB (" |
| + MB + " bytes)"); |
| bean.setCollectionUsageThreshold(MB); |
| System.out.println("Collection usage threshold: " |
| + bean.getCollectionUsageThreshold()); |
| System.out.println("Collection usage threshold count: " |
| + bean.getCollectionUsageThresholdCount()); |
| System.out.println("Collection usage threshold exceeded: " |
| + (bean.isCollectionUsageThresholdExceeded() |
| ? "yes" : "no")); |
| } |
| System.out.println("Memory manager names: " |
| + Arrays.toString(bean.getMemoryManagerNames())); |
| System.out.println("Peak usage: " + bean.getPeakUsage()); |
| System.out.println("Current usage: " + bean.getUsage()); |
| System.out.println("Resetting peak usage..."); |
| bean.resetPeakUsage(); |
| System.out.println("Peak usage: " + bean.getPeakUsage()); |
| System.out.println("Current usage: " + bean.getUsage()); |
| boolean usage = bean.isUsageThresholdSupported(); |
| System.out.println("Usage threshold supported: " + usage); |
| if (usage) |
| { |
| System.out.println("Usage threshold: " |
| + bean.getUsageThreshold()); |
| System.out.println("Setting usage threshold to 1MB (" |
| + MB + " bytes)"); |
| bean.setUsageThreshold(MB); |
| System.out.println("Usage threshold: " |
| + bean.getUsageThreshold()); |
| System.out.println("Usage threshold count: " |
| + bean.getUsageThresholdCount()); |
| System.out.println("Usage threshold exceeded: " |
| + (bean.isUsageThresholdExceeded() |
| ? "yes" : "no")); |
| } |
| System.out.println("Valid: " + (bean.isValid() ? "yes" : "no")); |
| } |
| } |
| } |